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The Coherent Potential Approximation in the Theory of Paramagnetic Alloys
Author(s) -
Kozarzewski B.,
Nowak J.,
Zieliński J.
Publication year - 1976
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220740203
Subject(s) - coherent potential approximation , condensed matter physics , paramagnetism , electrical resistivity and conductivity , impurity , thermal conduction , kondo effect , logarithm , anderson impurity model , electron , physics , materials science , chemistry , thermodynamics , quantum mechanics , mathematics , electronic structure , mathematical analysis
It is shown how the coherent potential approximation (CPA) can be extended to describe the properties of paramagnetic alloys. The properties of conduction electrons are discussed. Even at very low concentrations of magnetic impurities, results presented here differ from those of the single impurity approximation. As an example the temperature dependence of the resistivity of alloys in the s–d exchange model is analysed. For T much lower than the Kondo temperature, T 2 behaviour of the resistivity is derived, which then goes through a more or less pronounced linear region to logarithmic dependence for temperatures higher than T K .